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Simplifying 2(x + -6) + -4x(x + 2) = -18 Reorder the terms: 2(-6 + x) + -4x(x + 2) = -18 (-6 * 2 + x * 2) + -4x(x + 2) = -18 (-12 + 2x) + -4x(x + 2) = -18 Reorder the terms: -12 + 2x + -4x(2 + x) = -18 -12 + 2x + (2 * -4x + x * -4x) = -18 -12 + 2x + (-8x + -4x2) = -18 Combine like terms: 2x + -8x = -6x -12 + -6x + -4x2 = -18 Solving -12 + -6x + -4x2 = -18 Solving for variable 'x'. Reorder the terms: -12 + 18 + -6x + -4x2 = -18 + 18 Combine like terms: -12 + 18 = 6 6 + -6x + -4x2 = -18 + 18 Combine like terms: -18 + 18 = 0 6 + -6x + -4x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(3 + -3x + -2x2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(3 + -3x + -2x2)' equal to zero and attempt to solve: Simplifying 3 + -3x + -2x2 = 0 Solving 3 + -3x + -2x2 = 0 Begin completing the square. Divide all terms by -2 the coefficient of the squared term: Divide each side by '-2'. -1.5 + 1.5x + x2 = 0 Move the constant term to the right: Add '1.5' to each side of the equation. -1.5 + 1.5x + 1.5 + x2 = 0 + 1.5 Reorder the terms: -1.5 + 1.5 + 1.5x + x2 = 0 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + 1.5x + x2 = 0 + 1.5 1.5x + x2 = 0 + 1.5 Combine like terms: 0 + 1.5 = 1.5 1.5x + x2 = 1.5 The x term is 1.5x. Take half its coefficient (0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. 1.5x + 0.5625 + x2 = 1.5 + 0.5625 Reorder the terms: 0.5625 + 1.5x + x2 = 1.5 + 0.5625 Combine like terms: 1.5 + 0.5625 = 2.0625 0.5625 + 1.5x + x2 = 2.0625 Factor a perfect square on the left side: (x + 0.75)(x + 0.75) = 2.0625 Calculate the square root of the right side: 1.436140662 Break this problem into two subproblems by setting (x + 0.75) equal to 1.436140662 and -1.436140662.Subproblem 1
x + 0.75 = 1.436140662 Simplifying x + 0.75 = 1.436140662 Reorder the terms: 0.75 + x = 1.436140662 Solving 0.75 + x = 1.436140662 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 1.436140662 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 1.436140662 + -0.75 x = 1.436140662 + -0.75 Combine like terms: 1.436140662 + -0.75 = 0.686140662 x = 0.686140662 Simplifying x = 0.686140662Subproblem 2
x + 0.75 = -1.436140662 Simplifying x + 0.75 = -1.436140662 Reorder the terms: 0.75 + x = -1.436140662 Solving 0.75 + x = -1.436140662 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -1.436140662 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -1.436140662 + -0.75 x = -1.436140662 + -0.75 Combine like terms: -1.436140662 + -0.75 = -2.186140662 x = -2.186140662 Simplifying x = -2.186140662Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.686140662, -2.186140662}Solution
x = {0.686140662, -2.186140662}
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